Universal end mill grinding fixture



Oct. 11, 1949. A. ROCHELEAU 2,484,590

UNIVERSAL END MILL GRINDING FIXTURE Filed March 15,1948 2 Sheets-Sheet l INVENTOR. L. ARocHzLmu Oct. 11, 1949. A. ROCHELEAU UNIVERSAL END MILL GRINDING FIXTURE 2 Sheets-Sheet 2 Filed March 15, 1948 I v INVENTOR. L. A. QocHaLEAu Patented Oct. 11, 1949 UNITED STATES PATENT OFFICE 2,484,590 UNIVERSAL ENDMILL GRINDING FIXTURE v Leopold A. Rocheleau, Leominster; Mass. Application March 15, 1948, Serial No. 14,963 I 4 g 1 7 Claims. (01. 51-225) This invention relates o a new and improved universal end mill grinding fixture which may be used to grind tools at either side of the grinding wheel and the main feature of which involves anv adjustable ring-like device clamped to a, head and having a guide finger thereon for guiding right or left end mills which are'fluted either right or left hand.

Further objects of the invention reside in the provision of a universal tool'grinding fixture including a construction which may be adjusted to grind right or left hand end mills on the flutes thereof to sharpen the same; for grinding the end of the end mills; for grinding endmillswith either left or right hand spirals, and for grinding tools at any angle.

Other objects and advantages of the invention- Fig. 1 is a view in front elevation of a device.

according to the invention;

Fig, 2 is a view similar to Fig. 1 but showing the device at the opposite side of the grinding wheel;

Fig. 3 is a section on line 3-3 of Fig. 1;

Fig. 4 is a section on line 4-4 of Fig. 1; and

Fig. 5 is a section on line 5--5 of Fig. 2.

As shown in the drawings. there is provided a base [U which is adapted to be secured to a machine bed by any desired or convenient means, such as the ears l2, which may be bolted to a machine bed or platen in desired relation to the grinding wheel i4 thereof.

Pivotally mounted on the base l0 there is a standard 16 which may be angularly adjusted about a vertical axis to any desired degree as indicated by the indicia 18 which appears on the base In, the standard l6 being provided with an index finger 20 so as to indicate the degree of anular departure from the zero position shown in Fi s. 1 and 2. The standard l8, of course, is provided with a clamping mechanism which may be of any usual or convenient kind.

The standard I6 rises as shown in Figs. 1 and 2 and is provided at its upper end with a rotary index plate 22 mounted on a horizontal axis 24 and adapted to be clamped in any rotative position desired about this axis. Integral with the plate 22 is a barrel or sleeve 26 which is, of course, angularly adjustable therewith. This sleeve slidingly and rotatinglv receives a collet 28 having an operating handle 30 for holding a tool 32 therein at 34 and also provided with a handle 36 for moving the collet in and out and rotatably in the sleeve 26. Indexing devices may, of course, be used with the collet.

Both ends of the sleeve 26 are milled out on a circle as indicated at 38 to receive a split ring All which may be clamped thereto as by means of a In the use of the apparatus, asshown in Fig.

1, the device is set for grinding right hand end mills with right hand spirals and the .set up of Fig. 2 shows grinding right hand end mills with a left hand spiral. The end mill 32 is inserted in the collet 28 and clamped therein by means of the thumbpiece 3i] and one of those spirals of the end mill is engaged with the top of the finger 52, whereupon the thumbpiece 36 is grasped to move the collet through the sleeve into engagement with the grinding wheel M, the end mill or another tool being ground and the collet being rotated by the engagement of the tool with the finger 52, so that a smooth even grinding cut is obtained.

In order to reset the device from the Fig. 1 position to the Fig. 2 position, the ring 40 may be placed in the other end of the sleeve and the collet 28 reversed or the entire device could be swung about its vertical axis on base I0.

It is also pointed out that the guide finger 52 may be swiveled half-way around to depend instead of rise up from its support 48 or it may be set at any angle if such is desired. The entire device may be set at to the position shown in Figs. 1 and 2, to grind the end of the end mill or it may be swiveled to any degree to grind any angle desired.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed otherwise than as set forth in the claims, but what I claim is:

1. A device of the class described comprising a base, a standard, means to swivel the standard on the base on a vertical axis, a sleeve swiveled on the standard on a horizontal axis, a tool holder slidably and rotatably mounted in the sleeve, a guide finger holder for the tool adjustably and removably mounted on the sleeve at each end having a-co11et type of 3. A universal tool grinding fixture comprising I a base, a standard thereon and -angularly adjust able with relation thereto on a vertical axis, a-

sleeve on the standard and angularly adjustable thereon in a horizontal axis, alcoll'et' or the'like'" slidable in the sleeve, a ring adjustable on and removable from the sleeve at each end" thereof, and a rest in the form of a pin mounted on the ring to engage a' spiral of a tool held in the collet.

4'; A universal toolgrinding fixture comprising a base; a-standard thereon and'angularly adjustable' with relation thereto on a verticalaxis, a sleeve on thestandard and angularlyadjustable thereon in a horizontal axis, a collet or 'the likeslidable in thesleeve, a ring rotatably ad-* just'abl'e-on thesleevean'd a rest in the form of a pin mounted on the ringto engage a spiral of a tool held' in'the collet, said'rest being revolvably mounted ontheringtodepend from the sleeve or to rise up therefrom;

5"; A universal' tbol grinding fixture comprising aba'se;-a standard thereon and angularly adjust+ able with relation thereto on a vertical axis; a sleeve on 'thestandard and angularly adjustable thereon ona horizontal axis; a collet orthelike sli'dable in the sleeve'and' a rest in the=form*of" s 4 a pin mounted on the sleeve to engage a spiral of a tool held in the collet, and a ring revolvable on the sleeve, the rest being secured in adjusted position on the ring.

6. A universal tool grinding fixture comprising a base, a standard thereon and angularly adjustable with relation thereto on a vertical axis, a sleeve on the standard and angularly adjustable-thereon on a horizontal- -axis, a collet or the like'slid'able in the sleeve and a rest in the form of a pin mounted on the sleeve to engage a spiral of-a tool held in the collet, and a ring revolvable on the sleeve, the rest being secured in adjusted position on-thering; said sleeve receiving the ring at either end selectively.

'7. A universaltool grinding fixture comprising a base'ya standard thereon and angularly adjustable with relation thereto on a vertical axis, asleeve' on the standard and angularly adjustable thereon on a horizontal axis, a collet or the like's'lidable in the sleeve" and a rest-inthe'fo'rm of apin mounted on the sleeve to engage a spiral ofa tool held inthe collet; and a ringrevolvable on the sleevettlie rest being secured? in adjusted position' on the ring;isaidfsleeve being circularly recessed at both end's'to selectively receive the ring at eitherr'end and-pointingi either. upor down at either end for right and left hand endmills with :left" or righthand' spirals;

- LEQPGED" A; -ROGHELEAU:

REFERENCES GIT-ED- The" following" references are of record in the me of this" patent: 

